Water heater

Abstract

The utility model relates to a water heater which comprises an outer shell, an inner container assembly and a pressure relief device, and an installation inner cavity is formed in the outer shell. The inner container assembly is arranged in the mounting inner cavity, and the inner container assembly at least comprises one inner container; the pressure relief device is arranged in the mounting inner cavity, the pressure relief device comprises a tank body and a separator, and a pressure relief inner cavity is formed in the tank body; the partition piece is arranged in the pressure relief inner cavity, the pressure relief inner cavity is divided into a water storage cavity and an air storage cavity under the action of the partition piece, the water storage cavity is communicated with the water inlet pipeline and the inner container and used for adjusting the water inlet pressure, when the water pressure in the water inlet pipeline is too large, part of water flow is input into the water storage cavity, the water flow entering the inner container is reduced, and it is guaranteed that the pressure of the water heater is not too large; when the water pressure in the water inlet pipeline is too small, the water flow in the water storage cavity is input into the inner container, fluctuation impact of the inlet water flow is buffered, and the water pressure of the water heater is balanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of household appliances, and in particular relates to a water heater. Background Art

[0002] Nowadays, with the improvement of technology and life, the heights of floors on the market are also uneven, and the water pressure on different floors is different. The water pressure on high floors is often insufficient due to pressure and gravity. Anyway, the water pressure for users (residents) on the lower floors is too high, and water-using appliances will have problems such as burst pipes and leaks at joints due to the high water pressure.

[0003] To address the above problems, an expansion tank and a pressure relief valve are generally connected to buffer the dynamic impact of water pressure. The pressure relief valve uses a spring to balance the water pressure difference. The spring is prone to aging during use, which will affect its performance and result in insufficient pressure relief capacity, leading to water leakage.

[0004] In addition, the compression stroke of the spring is fixed. Therefore, the pressure relief process can only be started when the pressure relief threshold of the pressure relief valve reaches the threshold of the spring. The range of threshold adjustment is limited, and the structure of the pressure relief valve components is complex. The working process is prone to noise, and the user experience is poor. Summary of the invention

[0005] The utility model aims to provide a water heater to solve the problems existing in the prior art of using a spring pressure relief valve in an existing electric water heater, such as rapid aging of the pressure relief valve, unadjustable pressure relief threshold range, and high operating noise.

[0006] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a water heater, which comprises:

[0008] An outer shell having a mounting inner cavity formed therein;

[0009] An inner liner assembly is arranged in the installation inner cavity, and the inner liner assembly includes at least one inner liner;

[0010] A pressure relief device is arranged in the installation inner cavity, and the pressure relief device comprises:

[0011] A tank body having a pressure relief cavity formed therein;

[0012] A partition is arranged in the pressure relief inner cavity. The pressure relief inner cavity is divided into a water storage cavity and an air storage cavity under the action of the partition. The water storage cavity is connected with a water inlet pipeline and the inner tank. An air inlet valve port is formed on the air storage cavity.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] The water heater pressure relief device involved in the present application comprises a tank body and a partition arranged in the tank body, wherein the partition divides the pressure relief inner cavity into a water storage cavity and an air storage cavity, wherein the air storage cavity is filled with nitrogen or other gases, and the water storage cavity is connected with a water inlet pipeline and an inner tank, and is used to adjust the water inlet pressure. When the water pressure in the water inlet pipeline is too high, part of the water flow is input into the water storage cavity, thereby reducing the water flow entering the inner tank, thereby ensuring that the water heater pressure is not too high; when the water pressure in the water inlet pipeline is too low, the water flow in the water storage cavity is input into the inner tank, thereby ensuring that the water pressure in the water heater is not too low;

[0015] The working process of the pressure relief device is mainly achieved through the movement or scaling of the partition. The overall structure of the pressure relief device is simple, occupies less space in the water heater, is easy to maintain, is noiseless, has a long service life, and provides better user experience.

[0016] In some embodiments of the present application, the inner liner assembly includes a first inner liner and a second inner liner arranged in parallel, the first inner liner is located below the second inner liner, an installation position is formed between the first inner liner, the second inner liner and the outer shell, and the pressure relief device is installed in the installation position.

[0017] The pressure relief device is installed between the outer shell and the inner tank assembly, making full use of the space formed between the outer shell and the inner tank assembly, without affecting the overall size of the water heater, thus avoiding the problem of the overall size of the water heater being too large.

[0018] In some embodiments of the present application, the first inner liner and the second inner liner each include a transverse circumferential side portion and a top arc portion located at both ends of the transverse circumferential side portion, and the circumferential side of the tank body is formed with a mounting plane and a mounting arc surface, the mounting plane is connected to the inner wall of the outer shell, and the shape of the mounting arc surface is adapted to the transverse circumferential side portions of the first inner liner and the second inner liner.

[0019] The shape of the circumference of the tank body is designed to match the shape of the mounting position formed between the inner tank assembly and the outer shell to fully utilize the space.

[0020] In some embodiments of the present application, a first end cover and a second end cover are respectively provided at both ends of the outer shell, an electrical room shell is provided between the first end cover and the inner tank assembly, an electrical room is formed in the electrical room shell, and the pressure relief device is installed in the electrical room.

[0021] In some embodiments of the present application, a water inlet and outlet are formed on the tank body, the water inlet and outlet are connected to the water storage chamber, a tee is connected to the water inlet pipeline, and the other two ports of the tee are respectively connected to the second inner tank and the water inlet and outlet.

[0022] The tee piece is specifically arranged in the electrical room for easy installation. The tee piece is formed with three ports that are interconnected, which are respectively connected to the water inlet and outlet, the second inner tank and the water inlet pipe. The water storage chamber changes according to the water pressure change in the water inlet pipe to adjust the water pressure in the second inner tank.

[0023] In some embodiments of the present application, the partition is a rubber diaphragm formed in the pressure relief inner cavity, and the water storage cavity and the air storage cavity are respectively arranged on both sides of the partition.

[0024] The rubber diaphragm has a certain elasticity. When the amount of water in the water storage chamber changes, it can move between the water storage chamber and the air storage chamber in a targeted manner to adjust the capacity in the water storage chamber.

[0025] In some embodiments of the present application, the separator is an airbag, the inlet of the airbag is connected to the water inlet and outlet, and the material of the airbag is rubber.

[0026] The water storage chamber is formed in the air bag, and the air bag can be increased or decreased as the amount of water in the water storage chamber changes.

[0027] In some embodiments of the present application, the tank body is made of carbon steel, and an anti-rust coating is formed on the surface of the tank body.

[0028] The anti-rust coating can prevent the tank from rusting and increase the service life of the tank.

[0029] In some embodiments of the present application, the first inner liner and the second inner liner are connected via a connecting portion, a transversely extending water outlet liner is provided in the second inner liner, and the water outlet liner is connected to a water outlet pipeline.

[0030] In some embodiments of the present application, a transversely extending water inlet liner is provided in the first inner tank, and the water inlet liner is connected to the water inlet pipeline.

[0031] The low-temperature water input from the water inlet pipe enters the first inner tank through the water inlet liner, is heated in the first inner tank, and the heated water is input upward into the second inner tank through the connecting part. After further heating, it is input from the water outlet liner and output to the water use terminal through the water outlet pipe.

[0032] In some embodiments of the present application, a flange opening is formed on one end of the first inner liner and the second inner liner close to the electrical room shell, and a mounting opening adapted to the position of the flange opening is formed on the electrical room shell. A mounting flange is connected to the mounting opening of the electrical room shell, and a heating element is provided on the mounting flange. The heating element extends through the flange opening into the first inner liner or the second inner liner.

[0033] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1 This is one of the schematic diagrams of the external structure of the water heater proposed by the utility model;

[0036] Figure 2 This is a schematic diagram of the water heater disassembly;

[0037] Figure 3 It is a cutaway diagram of a water heater;

[0038] Figure 4 It is a schematic diagram of the installation position of the pressure relief device in the water heater;

[0039] Figure 5 It is one of the schematic diagrams of the pressure relief device structure;

[0040] Figure 6 This is the second schematic diagram of the pressure relief device structure;

[0041] Figure 7 It is a schematic diagram of the end structure of the water heater;

[0042] Figure 8 yes Figure 7 AA section view in;

[0043] Fig. 9 It is a schematic diagram of another structural form of the connecting part;

[0044] Fig.10 is a schematic diagram of the first inner tank structure;

[0045] Fig.11 It is a schematic diagram of the structure of the liner assembly;

[0046] Fig.12 is a schematic diagram of the second end cover structure;

[0047] Fig.13 1. It is a schematic diagram of the structure of the hooking part;

[0048] Fig.14 1. It is a schematic diagram of the structure of the internal transfer part;

[0049] In the figure,

[0050] 100, outer shell; 110, first end cover; 120, second end cover; 121, support portion; 122, support surface; 130, hanging portion; 140, support block;

[0051] 200, liner assembly; 210, first liner; 211, punching flange portion; 212, flange opening; 220, second liner; 230, connecting portion; 240, internal transfer portion; 250, heating element; 260, water inlet liner; 261, first water inlet liner; 262, second water inlet liner; 270, water outlet liner; 271, first water outlet liner; 272, second water outlet liner; 280, water treatment device;

[0052] 300, pressure relief device; 301, air storage chamber; 302, water storage chamber;

[0053] 310, tank body; 311, installation plane; 312, installation arc surface;

[0054] 320, separator;

[0055] 330, water inlet and outlet;

[0056] 400, electrical room housing;

[0057] 500, tee; 510, water inlet pipe; 520, cold water pipe; 530, pressure relief pipe; 540, water outlet pipe. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0059] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0062] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0063] An electric water heater uses electricity as its main energy source. The high-temperature heat generated after power is turned on directly heats the water stored in the electric water heater to prepare hot water.

[0064] An electric water heater usually includes a water tank, an electric heating component, an electric control board and other components. A water storage cavity is formed in the water tank to store the water to be heated. The electric heating component is inserted into the water storage cavity formed by the water tank. The electric control board is used to control the on and off operation of the electric heating component so that the water in the water tank is heated to a set temperature.

[0065] For the water tank of an electric water heater, the water tank generally includes an outer shell and an inner tank, and an insulation layer is formed between the outer shell and the inner tank. Among them, the outer shell is generally made of plastic material to meet the design requirements of beautiful and diverse shapes; the inner tank can be made of metal or plastic according to needs.

[0066] In addition, the insulation layer formed between the outer shell and the inner liner, commonly used insulation materials include: asbestos, sponge, foam plastic, polyurethane foam, etc. In conventional technology, in order to obtain a good insulation effect, the insulation layer is usually formed by foaming.

[0067] Among them, for the inner tank using a metal tank body, the interior of the inner tank is prone to corrosion due to the influence of water quality. For this reason, a magnesium rod is also configured on the water tank, and the magnesium rod is inserted into the water storage cavity inside the water tank.

[0068] Since magnesium is the metal with the lowest potential in the electrochemical series and is physiologically non-toxic, it is ideal for making magnesium rods to protect the inner liner. The size of the magnesium rod is directly related to the length of time the inner liner is protected and the size of the protective effect. The larger the magnesium rod, the better the protective effect and the longer the protection time.

[0069] The water tank is also provided with a water inlet pipe and a water outlet pipe. The water inlet pipe is used to transport cold water to the water storage cavity formed in the water tank, while the hot water in the water storage cavity is output from the water outlet pipe.

[0070] For the electric heating component, electric heating methods such as electric heating wire, magnetic energy or silicon tube heating can be used to heat the water stored in the water storage cavity.

[0071] As for the electric control board, it is used to receive the detection signals sent by relevant sensors (such as water temperature sensors, flow sensors), and at the same time, control the power on and off operation of the electric heating components.

[0072] When the electric water heater is working, the electric control board controls the electric heating component to be powered on for heating. When the water temperature in the water tank reaches the set value, the electric control board controls the electric heating component to be powered off.

[0073] refer to Figure 1-Figure 4 The utility model proposes a water heater, which includes an outer shell 100, an inner tank assembly 200 and a pressure relief device 300. The pressure relief device 300 is used to adjust the water pressure input into the inner tank assembly 200 to ensure that the water pressure in the water heater is controlled within a preset range to avoid water leakage at the joints or bursting of water pipes due to excessive water pressure, or water shortage due to excessive water pressure.

[0074] Specifically, an installation cavity is formed in the outer shell 100, and the liner assembly 200 is arranged in the installation cavity. The liner assembly 200 includes at least one liner.

[0075] Combination Figure 5 , Figure 6The pressure relief device 300 includes a tank body 310 and a partition 320. A pressure relief inner cavity is formed in the tank body 310. The partition 320 is arranged in the pressure relief inner cavity to divide the pressure relief inner cavity into a water storage cavity 302 and an air storage cavity 301.

[0076] The water storage chamber 302 is connected to the water inlet pipeline 510 and the inner tank. The amount of water in the water storage chamber 302 is adjusted according to the water pressure in the water inlet pipeline 510, thereby adjusting the water pressure in the inner tank within a preset range.

[0077] Specifically, when the water pressure in the water inlet pipe 510 is too high, part of the water flow is input into the water storage chamber 302 to reduce the water flow entering the inner tank; when the water pressure in the water inlet pipe 510 is too low, the water flow in the water storage chamber 302 is input into the inner tank to increase the water pressure in the inner tank.

[0078] The working process of the pressure relief device 300 is mainly achieved by moving or scaling the partition 320. The overall structure of the pressure relief device 300 is simple, occupies less space in the water heater, is easy to maintain, is noiseless, has a long service life, and provides better user experience.

[0079] Combination Figure 7 The tank body 310 is formed with a water inlet and outlet 330, and the water inlet and outlet 330 is directly connected to the water storage chamber 302. The water inlet pipeline 510 is connected with a tee 500, and the other two ports of the tee 500 are respectively connected to the second inner tank 220 and the water inlet and outlet 330.

[0080] In other words, three ports that are interconnected are formed on the tee piece 500, which are respectively connected to the water inlet and outlet 330 on the tank body 310, the inner tank and the water inlet pipe 510 through the pressure relief pipe 530. The water storage chamber 302 changes according to the water pressure change in the water inlet pipe 510 to adjust the water pressure in the inner tank.

[0081] The outer shell 100 is provided with a first end cover 110 and a second end cover 120 at both ends thereof, and an electric chamber housing 400 is provided between the first end cover 110 and the inner tank assembly 200 . An electric chamber is formed in the electric chamber housing 400 .

[0082] The tee piece 500 is specifically arranged in the electrical room to facilitate installation and subsequent maintenance and inspection.

[0083] In some embodiments of the present application, the partition 320 is a rubber diaphragm formed in the pressure relief cavity, and the water storage cavity 302 and the air storage cavity 301 are respectively arranged on both sides of the partition 320 .

[0084] The rubber diaphragm has a certain elasticity, and when the amount of water in the water storage chamber 302 changes, it can move between the water storage chamber 302 and the air storage chamber 301 in a targeted manner to adjust the capacity in the water storage chamber 302 .

[0085] The rubber diaphragm-shaped separator 320 can completely separate water and air. Water is on one side of the separator 320, and air is pre-filled on the other side of the separator 320. The expansion tank with the rubber diaphragm does not have the problem of gas dissolution and water loss, can be inflated once and used for a long time, thus saving investment, simplifying the system, and expanding the scope of use. It is often used for secondary water supply in high-rise buildings.

[0086] In some other embodiments of the present application, the separator 320 is an airbag, the inlet of the airbag is connected to the water inlet and outlet 330, and the material of the airbag is rubber.

[0087] The water storage chamber 302 is formed in the air bag, and the air bag can increase or decrease as the amount of water in the water storage chamber 302 changes.

[0088] In some embodiments of the present application, the tank body 310 is made of carbon steel, and a rust-proof coating is formed on the surface of the tank body 310 .

[0089] The anti-rust coating can prevent the tank body 310 from rusting, thereby increasing the service life of the tank body 310 .

[0090] Water is inside the airbag, and the air storage chamber 301 between the outside of the airbag and the tank body 310 is pre-filled with air.

[0091] The pre-filled gas in the gas storage chamber 301 is already filled before leaving the factory, and there is no need to add gas yourself during assembly. The gas in the gas storage chamber 301 is nitrogen.

[0092] When the water in the water inlet pipe 510 enters the partition 320 of the airbag structure, the nitrogen sealed in the air storage chamber 301 is compressed. According to Boyle's gas law, the volume of the gas decreases and the pressure increases after being compressed. The water intake stops when the gas pressure in the air storage chamber 301 reaches the same as the pressure in the water storage chamber 302.

[0093] When the water pressure in the liner is low, the pressure in the water storage chamber 302 decreases, and the gas pressure in the air storage chamber 301 is greater than the pressure in the water storage chamber 302. At this time, the gas in the air storage chamber 301 expands to squeeze out the water in the airbag.

[0094] An air inlet valve port is reserved on the air storage chamber 301 to facilitate air replenishment to the air storage chamber 301 or adjustment of the pressure threshold thereof.

[0095] In other embodiments of the present application, in order to facilitate real-time monitoring of the pressure in the air storage chamber 301 to ensure that the pressure in the air storage chamber 301 is within a preset range, the present application may also set a pressure detector in the air storage chamber 301.

[0096] The pressure detector can detect the air pressure in the air storage chamber 301 in real time to facilitate later maintenance and remind the user to replenish air in time.

[0097] In addition, an automatic pressure regulating device may be connected to the air inlet valve port of the expansion tank, and the water pressure may be detected by the automatic pressure regulating device, thereby automatically adjusting the internal air pressure of the expansion tank to achieve controllable and timely pressure relief.

[0098] Specific reference Figure 2-Figure 4 In some embodiments of the present application, the water heater involved in the present application is a double-tank electric water heater, and the inner tank assembly 200 includes a first inner tank 210 and a second inner tank 220 arranged in parallel, and the first inner tank 210 is located below the second inner tank 220, and an installation position is formed between the first inner tank 210, the second inner tank 220 and the outer shell 100, and the pressure relief device 300 is installed in the installation position.

[0099] The pressure relief device 300 is installed between the outer shell 100 and the inner tank assembly 200, making full use of the space formed between the outer shell 100 and the inner tank assembly 200, without affecting the overall size of the water heater, thereby avoiding the problem of the overall size of the water heater being too large.

[0100] The first inner liner 210 and the second inner liner 220 both include a transverse circumferential side portion and a top arc portion located at both ends of the transverse circumferential side portion. The transverse circumferential side portion is a cylindrical structure, and the top arc portion is specifically a hemispherical structure.

[0101] A mounting plane 311 and a mounting arc surface 312 are formed on the circumference of the tank body 310 . The mounting plane 311 is a planar structure matched with the inner wall of the outer shell 100 .

[0102] The mounting plane 311 is connected to the inner wall of the outer shell 100, and two mounting arc surfaces 312 are symmetrically arranged above and below the mounting plane 311. The shapes of the two mounting arc surfaces 312 are respectively adapted to the lateral circumferential sides of the first inner liner 210 and the second inner liner 220 to make full use of the space.

[0103] In some other embodiments of the present application, the pressure relief device 300 is installed in the electrical room, and a mounting position is reserved in the electrical room to facilitate the installation and maintenance of the pressure relief device 300 .

[0104] The first inner pot 210 and the second inner pot 220 are interconnected to improve heating efficiency.

[0105] A first heating cavity is formed in the first inner pot 210, a second heating cavity is formed in the second inner pot 220, and a connecting portion 230 is provided between the first inner pot 210 and the second inner pot 220 for connecting the first heating cavity with the second heating cavity.

[0106] The connecting portion 230 may be disposed between the top arc portions of the first inner liner 210 and the second inner liner 220 , or may be disposed between the lateral circumferential sides of the first inner liner 210 and the second inner liner 220 .

[0107] When the connecting portion 230 is disposed between the top arc portions of the first inner liner 210 and the second inner liner 220 , the connecting portion 230 is specifically a connecting pipe structure connected between the top arc portions of the same end of the first inner liner 210 and the second inner liner 220 .

[0108] One end of the connecting portion 230 is connected to the upper position of the first inner pot 210, and the other end of the connecting portion 230 is connected to the lower position of the second inner pot 220, so as to transport the heated water in the first inner pot 210 to the second inner pot 220 and further heat it into high-temperature water.

[0109] refer to Figure 8 In the present embodiment, a water inlet liner 260 and a water outlet liner 270 are respectively provided in the first inner liner 210 and the second inner liner 220. Specifically, a first water inlet liner 261 is provided at the lower position of the first inner liner 210, a first water outlet liner 271 is provided at the upper position of the first inner liner 210, a second water inlet liner 262 is provided at the lower position of the second inner liner 220, and a second water outlet liner 272 is provided at the upper position of the second inner liner 220.

[0110] The first water outlet liner pipe 271 and the second water inlet liner pipe 262 are connected via the connecting portion 230 .

[0111] The first water inlet liner 261 is connected to the water inlet pipeline 510 through the cold water pipeline 520 and the tee piece 500 .

[0112] The low-temperature water is input from the water inlet pipe 510 into the first heating cavity through the first water inlet liner 261, is heated by the heating element 250 in the first heating cavity, and then is input into the second water inlet liner 262 through the first water outlet liner 271 and the connecting part 230, and enters the second heating cavity from the second water inlet liner 262. After continued heating in the second heating cavity, high-temperature water is output from the second water outlet liner 272 and output to the water use terminal through the water outlet pipe 540.

[0113] refer to Figure 9-11In another embodiment, when the connecting portion 230 is arranged on the lateral circumferential side portion, connecting holes with matching positions are formed on the side walls of the first inner liner 210 and the second inner liner 220, and a punching flange portion 211 is formed on the outer side of the connecting hole.

[0114] The connecting portion 230 is formed by connecting the punching flange portions 211 on the first inner liner 210 and the second inner liner 220 .

[0115] In some embodiments of the present application, the first liner 210 and the second liner 220 are integrally formed.

[0116] The first liner 210 and the second liner 220 both include a transverse circumferential side portion and a top arc portion located at both ends of the transverse circumferential side portion, and the transverse circumferential side portion and the top arc portion are integrally formed.

[0117] The integral formation of the lateral circumferential side portion and the top circular arc portion can avoid the weld formed by welding the lateral circumferential side portion and the top circular arc portion after they are conventionally formed separately, and the integrity is stronger.

[0118] The punched flange portion 211 is formed by stamping, and the punched flange portions 211 at corresponding positions of the first inner tank 210 and the second inner tank 220 are directly connected by welding or other methods. The installation and manufacturing are simple and quick, which is conducive to reducing the layout of the pipeline between the first inner tank 210 and the second inner tank 220 of the conventional double-tank water heater.

[0119] The specific forming process of the first liner 210 and the second liner 220 is as follows:

[0120] First, punching is performed on the side walls of the first inner liner 210 and the second inner liner 220 to form the punching flange portion 211 .

[0121] The materials of the first inner liner 210 and the second inner liner 220 are both straight tubes, and punching and flanging processes are performed on the side walls of the straight tubes to achieve the formation of the punching and flanging parts 211 .

[0122] After the punching and flanging part 211 is formed, one end of the straight pipe is screwed and compressed. During the screwing and compression process, a flange opening 212 is reserved to facilitate the assembly of structures such as the installation flange.

[0123] After one end of the straight tube is formed, the other end is spun to form a seamless joint, so that the top arc portion and the lateral circumferential side portion of the first inner liner 210 and the second inner liner 220 are integrally formed.

[0124] That is, a flange opening 212 is formed at one end of the first inner liner 210 and the second inner liner 220 close to the electrical room shell 400, and a mounting opening matched with the position of the flange opening 212 is formed on the electrical room shell 400. A mounting flange is connected to the mounting opening of the electrical room shell 400, and a heating element 250 is provided on the mounting flange. The heating element 250 extends through the flange opening 212 to the first inner liner 210 or the second inner liner 220.

[0125] The heating element 250 is specifically a heating pipe structure, and the mounting flange extends the heating pipe into the first heating cavity and the second heating cavity respectively to heat the water in the first cavity and the second cavity.

[0126] A water inlet liner 260 is disposed in the first inner liner 210 , and a water outlet liner 270 is disposed in the second inner liner 220 .

[0127] The water outlet liner 270 is connected to the water outlet pipeline 540 , and the water inlet liner 260 is connected to the water inlet pipeline 510 through the cold water pipeline 520 and the tee piece 500 .

[0128] The low-temperature water input by the water inlet pipe 510 enters the first inner tank 210 through the water inlet liner 260, is heated in the first inner tank 210, and the heated water is input upward into the second inner tank 220 through the connecting portion 230. After further heating, it is input from the water outlet liner 270 and output to the water use terminal through the water outlet pipe 540.

[0129] An output port is formed at one end of the second inner tank 220 close to the electrical room shell 400. The output port is a through-hole structure. The output port is located above the flange opening 212. The water outlet liner 270 extends into the second inner tank 220 through the output port.

[0130] Since water with a higher temperature is transported upward in the heating cavity, the water outlet liner 270 is arranged at an upper position of the second heating cavity to facilitate the output of hot water.

[0131] Similarly, an input port is formed at one end of the first inner tank 210 close to the electrical room shell 400. The input port is also a through-hole structure. The input port is located below the flange opening 212. The water inlet liner 260 extends into the first inner tank 210 through the input port.

[0132] Since water with a lower temperature sinks in the heating cavity, the water inlet liner 260 is arranged at a lower position of the first heating cavity to facilitate the input of cold water.

[0133] In some embodiments of the present application, in order to improve the efficiency of cold water input and hot water output, the water inlet liner 260 and the water outlet liner 270 are arranged in a direction parallel to the axial direction of the first inner tank 210, that is, the water inlet liner 260 and the water outlet liner 270 are respectively horizontally arranged in the inner tank assembly 200.

[0134] In other embodiments, a plurality of water inlet and outlet holes are dispersedly provided on the pipe walls of the water inlet liner 260 and the water outlet liner 270 to improve the efficiency of water inlet or water outlet.

[0135] In some embodiments of the present application, the water inlet end of the water inlet liner 260 extends downward in the first inner tank 210 to the bottom of the first inner tank 210 to improve water circulation at the bottom of the first heating cavity.

[0136] The water inlet end of the water outlet liner 270 extends upward in the second inner tank 220 to the top of the second inner tank 220 so that the hot water at the top of the second heating cavity can be completely output.

[0137] refer to Fig.13 , Fig.14 The double tank water heater is hung on the wall through a hanging part 130. Specifically, the hanging part 130 is arranged on the rear side of the outer shell 100. The number of the hanging parts 130 is at least two, and the hanging parts 130 are arranged at intervals to improve the installation stability of the double tank water heater.

[0138] Furthermore, the hanging portion 130 is located at an upper position of the outer shell 100 , and a supporting block 140 is further connected to the outer shell 100 , and the supporting block 140 is located at a lower position of the outer shell 100 .

[0139] The support block 140 is used to provide auxiliary support for the water heater so that the lower part of the water heater is supported on the wall, thereby improving the stability of the water heater installation.

[0140] In some embodiments of the present application, since the weight of the inner liner assembly 200 is relatively large, in order to reduce the force exerted by the inner liner assembly 200 on the outer shell 100, at least two inner transition parts 240 are also spaced apart on the inner liner assembly 200. The inner liner assembly 200 is connected and fixed to the hanging part 130 via the inner transition parts 240, so that most of the weight of the inner liner assembly 200 is applied to the hanging part 130, thereby reducing the pressure on the outer shell 100.

[0141] Specifically, each inner transition part 240 is vertically arranged, and the two ends of the inner transition part 240 are respectively connected to the first inner liner 210 and the second inner liner 220. In addition to realizing the connection and fixation of the inner liner assembly 200 to the outside, the inner transition part 240 is also conducive to improving the connection and fixation between the first inner liner 210 and the second inner liner 220, and improving the stability of the connection between the first inner liner 210 and the second inner liner 220.

[0142] refer to Fig.12 In some embodiments of the present application, a support portion 121 is formed on one side of the second end cover 120 close to the liner assembly 200 , and a support surface 122 is formed on the support portion 121 and is adapted to the shape of the corresponding position of the liner assembly 200 .

[0143] A support portion 121 is also formed on one side of the electrical room housing 400 close to the inner tank assembly 200 , and a support surface 122 matching the shape of a corresponding position of the inner tank assembly 200 is formed on the support portion 121 .

[0144] The support surface 122 is in contact with the outer walls of the top arc portions on both sides of the liner assembly 200 , thereby improving the stability of the support for the liner assembly 200 and playing a supporting and limiting role.

[0145] In some embodiments of the present application, a water treatment device 280 is further provided in the first inner liner 210 and / or the second inner liner 220 , and the water treatment device 280 is used to treat the water in the first inner liner 210 and / or the second inner liner 220 .

[0146] The water treatment device 280 can improve the water quality in the first inner tank 210 and the second inner tank 220, and play the role of sterilization or adding minerals beneficial to the human body.

[0147] In some embodiments, the water treatment component includes an inner tube and an outer tube (not shown) that are sleeved with each other, and a purification inner cavity is formed between the inner tube and the outer tube for filling materials.

[0148] The water treatment component is configured to perform water quality treatment on the water flowing through it, and can perform water purification or mineralization and the like.

[0149] The outer tube is provided with a plurality of purification holes which penetrate therethrough, so as to facilitate the treatment of the materials in the inner cavity to purify the water in the inner tank, thereby realizing functions such as scale prevention, mineralization and chlorine removal.

[0150] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0151] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A water heater, characterized in that: include: An outer shell having a mounting inner cavity formed therein; An inner liner assembly is arranged in the installation inner cavity, and the inner liner assembly includes at least one inner liner; A pressure relief device is arranged in the installation inner cavity, and the pressure relief device comprises: A tank body having a pressure relief cavity formed therein; A partition is arranged in the pressure relief inner cavity. The pressure relief inner cavity is divided into a water storage cavity and an air storage cavity under the action of the partition. The water storage cavity is connected with a water inlet pipeline and the inner tank. An air inlet valve port is formed on the air storage cavity.

2. The water heater according to claim 1, characterized in that: The inner liner assembly includes a first inner liner and a second inner liner arranged in parallel, the first inner liner is located below the second inner liner, an installation position is formed between the first inner liner, the second inner liner and the outer shell, and the pressure relief device is installed in the installation position.

3. The water heater according to claim 2, characterized in that: The first inner liner and the second inner liner both include a transverse circumferential side portion and a top arc portion located at both ends of the transverse circumferential side portion. The circumferential side of the tank body is formed with a mounting plane and a mounting arc surface. The mounting plane is connected to the inner wall of the outer shell, and the shape of the mounting arc surface is adapted to the transverse circumferential side portion of the first inner liner and the second inner liner.

4. The water heater according to claim 2, characterized in that: The two ends of the outer shell are respectively provided with a first end cover and a second end cover, an electrical room shell is provided between the first end cover and the inner tank assembly, an electrical room is formed in the electrical room shell, and the pressure relief device is installed in the electrical room.

5. The water heater according to claim 2 or 4, characterized in that: The tank body is formed with a water inlet and outlet, the water inlet and outlet are connected to the water storage cavity, a tee is connected to the water inlet pipeline, and the other two ports of the tee are respectively connected to the second liner and the water inlet and outlet.

6. The water heater according to claim 1, characterized in that: The partition is a rubber diaphragm formed in the pressure relief inner cavity, and the water storage cavity and the air storage cavity are respectively arranged on both sides of the partition.

7. The water heater according to claim 5, characterized in that: The separator is an air bag, the inlet of the air bag is communicated with the water inlet and outlet, and the material of the air bag is rubber.

8. The water heater according to claim 1, characterized in that: The material of the tank body is carbon steel, and an anti-rust coating is formed on the surface of the tank body.

9. The water heater according to claim 2, characterized in that: The first inner liner and the second inner liner are connected via a connecting portion, a transversely extending water outlet liner is provided in the second inner liner, and the water outlet liner is connected to a water outlet pipeline.

10. The water heater according to claim 4, characterized in that: The first inner pot and the second inner pot are formed with a flange opening at one end close to the electrical room shell, and the electrical room shell is formed with a mounting opening matched with the position of the flange opening, the mounting opening of the electrical room shell is connected with a mounting flange, and a heating element is arranged on the mounting flange, and the heating element extends through the flange opening into the first inner pot or the second inner pot.

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